Organic light emitting display device with light compensation layer

Abstract

The present invention is to provide an organic light emitting display device for preventing a thin-film transistor from being deteriorated due to hydrogen when forming a light compensation layer configured to enhance viewing angle, and the organic light emitting display device may include a first substrate and a second substrate comprising a plurality of pixels; a thin-film transistor formed at each pixel of the first substrate; a color filter layer formed at each pixel; an insulating layer formed on the color filter layer; a light compensation layer formed on the insulating layer and made of a material containing no hydrogen; a pixel electrode formed on the light compensation layer of each pixel; an organic light emitting unit formed on the pixel electrode to emit light; and a common electrode formed on the organic light emitting unit.

What is claimed is: 
     
       1. An organic light emitting display device, comprising:
 a first substrate and a second substrate comprising a plurality of pixels; 
 a thin-film transistor formed on the first substrate; 
 a first insulating layer formed on the first substrate including the thin-film transistor; 
 a color filter layer formed on the first insulating layer in a pixel region; 
 a second insulating layer formed on the first substrate including the color filter layer; 
 a light compensation layer formed on the second insulating layer and made of a material without hydrogen, wherein the light compensation layer comes into contact with a pad of a drain of the thin-film transistor; 
 a plurality of holes formed on the light compensation layer to expose the second insulating layer therethrough to discharge foreign substances, wherein the holes are formed in an outer wall of each pixel regions; 
 a pixel electrode formed on the light compensation layer of each pixel region; 
 an organic light emitting unit formed on the pixel electrode to emit light; and 
 a common electrode formed on the organic light emitting unit, 
 wherein the light compensation layer is made of material having a refractive index of 1.5-2.7 to refract the light from the color filter layer. 
 
     
     
       2. The organic light emitting display device of  claim 1 , wherein the light compensation layer is made of a transparent material. 
     
     
       3. The organic light emitting display device of  claim 2 , wherein the light compensation layer is formed of a material selected from a group consisting of SiNx, indium tin oxide (ITO), and indium zinc oxide (IZO). 
     
     
       4. The organic light emitting display device of  claim 3 , wherein the SiNx is deposited with a thickness of 1500 to 2000 Å. 
     
     
       5. The organic light emitting display device of  claim 4 , wherein the plurality of holes are formed in a region corresponding to the color filter. 
     
     
       6. The organic light emitting display device of  claim 4 , wherein the plurality of holes are formed in a region corresponding to the color filter and within a color filter region.